#include<stdio.h>
#include<math.h>
main()
{
    int a,b,c,count=0;
    printf("There are different methods for XM to distribute books to 3 reder:\n");
    for(a=1;a<=5;a++)
    for(b=1;b<=5;b++)
    for(c=1;a!=b&&c<=5;c++)
    if(c!=a&&c!=b)
    printf(count%8?"%2d: %d,%d,%d": "%2d:%d,%d,%d\n",++count,a,b,c);
    return 0;
}